Update 4:30: The state rested its case this afternoon after murder victim Ivan Mejia's mother took the stand to talk about her son.

"We don't want to believe he's gone from us" Ana Garibaldo said through a Spanish speaking translator. "As a Christian family, we don't want to believe he's gone from us."

Update 2:30 p.m. The teenager who killed a classmate in Wylie was a fan of the TV show "Dexter," which revolves around a serial killer who exerts his own vigilante justice, a psychologist testified.

Dr. Robert Lackey said some of the ideas for the crime came from the show. Lackey also told the court the teen is more sophisticated than others his age but has a negative view of himself and has trouble trusting people.

On cross examination by defense attorney Edwin King, Lackey said the teen would be amenable to rehabilitation.

Original post: A hearing to determine whether a Wylie teenager will be tried as an adult in the killing his schoolmate continued today in a Collin County courtroom.

The March 8 killing of Ivan Mejia shocked the small community after two teens were arrested as they were trying to dispose of the body near Firewheel Town Center in Garland. Mejia was choked to death, reportedly because of a dispute over a girl.

The suspects are not being named due to their ages.

Psychologist Dr . Robert Lackey testified this morning that the 17-year-old suspect at the hearing "took 100 percent responsibility" for the crime.

Lackey told the court that the 17-year-old had been diagnosed with features of a generalized anxiety disorder four days before Mejia was killed but was not on any medication for the disorder.

But Lackey said the youth came from a good home, was a good student and involved in extracurricular activities.

His background made the crime more shocking, Lackey testified.

Yesterday, testimony revealed that the teen and the other suspect lured Mejia to his death by sending him a fake text message, purporting to be his girlfriend. They had planned the killing for a week, Wylie police detective Amanda Villalobos testified. They dug his grave the day before, leaving shovels behind to bury him.